On Thursday, Iranian President Hassan Rouhani talked up Iran's increasing self-sufficiency in fuel production. The comments came during the opening of the second phase of the Persian Gulf Star Refinery and Bandar Abbas.
Since the P5+1 nuclear deal allowed Iran to access much of its assets frozen internationally, they've been investing in improved infrastructure. Self-reliance on gasoline processing in particular is a priority. Rouhani noted that, if use was strictly limited, Iran could be self-sufficient right now. When the new refinery is fully up and running in the future, Iran will be totally self-sufficient.
Not only that, Iran may also be able to start exporting refined petrochemicals. While exporting crude oil is a vital part of Iran's economy, a step up to refined petrochemicals would be a major money-maker for the nation, and further shield them from US sanctions attempts.